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dotfiles/lain/.emacs.d/config.org

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Packaging

Package.el

Package.el is the built-in package manager in Emacs. This is where the fun begins.

  (require 'package)
  (setq package-archives
        '(("gnu"          . "https://elpa.gnu.org/packages/")
          ("melpa"        . "https://melpa.org/packages/")
          ("melpa-stable" . "https://stable.melpa.org/packages/")
          ("marmalade"    . "https://marmalade-repo.org/packages/")
          ("org"          . "https://orgmode.org/elpa/")))
  (setq package-enable-at-startup nil)
  (package-initialize)

use-package

use-package is a nifty macro that interfaces with Package.el, keeping package-specific configuration all in once place. It's pretty much the basis of this entire config.

  (unless (package-installed-p 'use-package)
    (package-refresh-contents)
    (package-install 'use-package))

  (eval-when-compile
    (require 'use-package))

  (setq use-package-compute-statistics t)
  (setq use-package-always-ensure t)
  (setq use-package-always-pin "melpa")
  (setq use-package-verbose t)

Custom Keywords

A few useful :keyword macros that extend the vanilla use-package functionality.

:company
  (require 'derived)

  (defun use-package-company-normalize (name keyword args)
    "Normalize the KEYWORD with NAME :company with arguments ARGS into a list of pairs for the handler."
    (use-package-as-one (symbol-name keyword) args
      (lambda (label arg)
        (unless (or (consp arg) (use-package-non-nil-symbolp arg))
          (use-package-error
            (concat
              label
              "<symbol> or "
              "(<symbol or list of symbols> . <symbol or function>) or "
              "a list of these")))
        (use-package-normalize-pairs
          (lambda (k)
            (or (use-package-non-nil-symbolp k)
                (and (consp k)
                     (not (cdr (last k)))
                     (seq-every-p 'use-package-non-nil-symbolp k))))
          #'use-package-recognize-function
          name label arg))))

  ;;;###autoload
  (defun use-package-company-handler (name _keyword args rest state)
    "Generate a function and hook from each pair in NAME ARGS for the keyword with NAME :company, appending the forms to the use-package declaration specified by REST and STATE."
    (use-package-concat
     (use-package-process-keywords name rest state)
     (mapcan
      (lambda (def)
        (let ((modes (car def))
              (backend (cdr def))
              (fun (intern (concat "use-package-company-add-" (symbol-name (cdr def))))))
          (when backend
            (append
             `((defun ,fun ()
                 (setq-local company-backends
                             (append company-backends '(,backend)))))
             (mapcar
              (lambda (mode)
                `(add-hook
                  ',(derived-mode-hook-name mode)
                  #',fun))
              (if (use-package-non-nil-symbolp modes) (list modes) modes))))))
      (use-package-normalize-commands args))))

  (defalias 'use-package-normalize/:company 'use-package-company-normalize)
  (defalias 'use-package-handler/:company 'use-package-company-handler)
  (defalias 'use-package-autoloads/:company 'use-package-autoloads-mode)

  (setq use-package-keywords
    (let ((idx (+ 1 (cl-position :hook use-package-keywords))))
      (append
        (seq-subseq use-package-keywords 0 idx)
        (list :company)
        (nthcdr idx use-package-keywords))))

Keybinds

which-key

which-key displays a popup in the minibuffer that shows keybindings following incomplete commands.

  (use-package which-key
    :diminish
    :config
    (which-key-mode))

General

General is an excellent keybind manager that adds tons of useful macros. Also set up a leader key and prefixes, like \ in Vim.

  (use-package general
    :config
    (general-create-definer jf-leader-def
      :keymaps 'override
      :states '(normal insert emacs)
      :prefix "SPC"
      :non-normal-prefix "M-SPC")

    (defun jf-create-wk-prefix (desc)
      "Helper for creating which-key prefix descriptions.
  Bind to a key with general to make which-key show DESC
  as the prefix's description"
      `(:ignore t :wk ,desc))

    (defmacro jf-create-definers (definitions)
      "A wrapper for general-create-definer.
    For every pair in DEFINITIONS, creates a leader
    with name jf-NAME-def and keybind SPC KEY or M-SPC KEY in normal mode."
      `(progn
         ,@(mapcan
            (lambda (def)
              (let ((key  (car def))
                    (name (cdr def)))
                `((general-create-definer ,(intern (concat "jf-" name "-def"))
                    :keymaps 'override
                    :states '(normal insert emacs)
                    :prefix ,(concat "SPC " key)
                    :non-normal-prefix ,(concat "M-SPC " key))
                  (jf-leader-def ,key ',(jf-create-wk-prefix name)))))
            definitions)))

    (jf-create-definers
     (("a" . "apps")
      ("b" . "buffers")
      ("f" . "files")
      ("g" . "git")
      ("h" . "help")
      ("m" . "major")
      ("o" . "org")
      ("p" . "projects")
      ("w" . "windows"))))

Vim Emulation

Evil

Evil is pretty much the entirety of Vim in Emacs.

  (use-package evil
    :diminish undo-tree-mode

    :preface
    (defun jf-window-split ()
      (interactive)
      (evil-window-split)
      (evil-window-down 1))
    (defun jf-window-vsplit ()
      (interactive)
      (evil-window-vsplit)
      (evil-window-right 1))

    :config
    (evil-mode t)

    (jf-windows-def
     "-" #'jf-window-split
     "=" #'jf-window-vsplit
     "b" #'balance-windows
     "H" #'evil-window-far-left
     "J" #'evil-window-bottom
     "K" #'evil-window-top
     "L" #'evil-window-far-right
     "h" #'evil-window-left
     "j" #'evil-window-right
     "k" #'evil-window-down
     "l" #'evil-window-right
     "o" #'other-frame)

    :custom
    (evil-want-integration t)
    (evil-want-keybinding nil)
    (evil-want-fine-undo t))

Evil Collection

Evil Collection adds Evil bindings for all the parts of Emacs that Evil doesn't cover properly by default.

  (use-package evil-collection
    :after evil
    :config
    (evil-collection-init
     '(calendar
       cmake-mode
       company
       custom
       debug
       dired
       doc-view
       elisp-mode
       elisp-refs
       eshell
       eval-sexp-fu
       flycheck
       flymake
       grep
       help
       ibuffer
       image
       image-dired
       info
       ivy
       js2-mode
       log-view
       man
       neotree
       python
       racer
       realgud
       which-key)))

Evil Extensions

Avy

An enhanced version of f in Vim.

  (use-package avy
    :general
    (:keymaps 'override
      :states 'normal
      "C-f" 'avy-goto-char-in-line
      "C-F" 'avy-goto-char))

Subword

Make boundaries between words in camelCase act as separate words for evil motions.

  (use-package subword
    :init
    (define-category ?U "Uppercase")
    (define-category ?u "Lowercase")
    (modify-category-entry (cons ?A ?Z) ?U)
    (modify-category-entry (cons ?a ?z) ?u)

    :config
    (push '(?u . ?U) evil-cjk-word-separating-categories))

evil-surround

Use S and a delimiter to surround in visual mode.

(use-package evil-surround
    :after evil
    :diminish
    :config
    (global-evil-surround-mode 1))

Emacs

Defaults

Configuration Editing

Add functions for editing and reloading the Emacs config files.

  (defun jf-edit-config ()
    (interactive)
    (find-file jf-config-file))

  (defun jf-edit-init ()
    (interactive)
    (find-file jf-init-file))

  (defun jf-reload-config ()
    (interactive)
    (org-babel-load-file jf-config-file))

  (jf-files-def
    "e"  (jf-create-wk-prefix "emacs files")
    "ec" #'jf-edit-config
    "ei" #'jf-edit-init
    "er" #'jf-reload-config)

Add to Load Path

Create and add a folder to the load path for local lisp files. The folder itself and all descendants will be added to the path. These packages will take precedence over other libraries with the same name.

  (unless (file-exists-p jf-load-path)
    (make-directory jf-load-path))

  (let ((default-directory jf-load-path))
    (setq load-path
          (append
           (let ((load-path (copy-sequence load-path)))
             (append
              (copy-sequence (normal-top-level-add-to-load-path '(".")))
              (normal-top-level-add-subdirs-to-load-path)))
           load-path)))

File Not Found Functions

Offer to create parent folders when a file is opened Offer to create nonexistant parent directories.

  (defun jf-create-nonexistant-directories ()
    (let ((parent-directory (file-name-directory buffer-file-name)))
      (when (and (not (file-exists-p parent-directory))
                (y-or-n-p (format "Directory `%s' does not exist. Create it?" parent-directory)))
        (make-directory parent-directory t)))) ; last argument specifies to behave like `mkdir -p'

  (add-to-list 'find-file-not-found-functions #'jf-create-nonexistant-directories)

Customize Location

Make changes in M-x customize go somewhere other than being schlunked into init.el.

  (setq custom-file (concat user-emacs-directory "_customize.el"))
  (load custom-file t)

Disable Bell

Shut up, emacs.

  (setq ring-bell-function #'ignore)

Shorter Prompts

Make yes-or-no prompts ask for y-or-n instead. Saves loads of time™.

  (defalias 'yes-or-no-p #'y-or-n-p)

Move Backup Files

By default, emacs gunks up every folder with file~ backups and #file# lockfiles. Schlunk them all in /tmp instead.

  (setq backup-directory-alist
        `((".*" . ,temporary-file-directory)))
  (setq auto-save-file-name-transforms
        `((".*" ,temporary-file-directory t)))

Secure auth-source

GPG encrypt stored auth tokens from auth-source instead of storing them in plaintext.

  (setq auth-sources '("~/.emacs.d/authinfo.gpg"))

Use UTF-8

Pleeeease default to UTF-8, Emacs.

  (setq locale-coding-system 'utf-8)
  (set-terminal-coding-system 'utf-8)
  (set-keyboard-coding-system 'utf-8)
  (set-selection-coding-system 'utf-8)
  (prefer-coding-system 'utf-8)

Trash when Deleting

Don't permanently delete stuff unless asked.

  (setq delete-by-moving-to-trash t)

Open Compressed Files

…automatically.

  (setq auto-compression-mode t)

Save Minibuffer History

  (savehist-mode 1)
  (setq history-length 1000)

Double Spaces

Why sentences would need double spaces to end I do not know.

  (set-default 'sentence-end-double-space nil)

Eval Print Level

Print more stuff when running C-x C-e or (eval-last-sexp)

  (setq eval-expression-print-level 100)

GC in Minibuffer

Don't garbage collect while the minibuffer is open, as heavy things like completion and searches are happening and will slow down with many garbage collections.

  (add-hook 'minibuffer-setup-hook #'jf-inhibit-gc)
  (add-hook 'minibuffer-exit-hook  #'jf-resume-gc)

UI

Font

Engage a nice coding font.

  (add-to-list 'default-frame-alist '(font . "Fira Code 12"))
  (set-face-attribute 'default t :font "Fira Code 12")

Menu Bar

Disable the useless cruft at the top of the screen.

  (menu-bar-mode -1)
  (tool-bar-mode -1)
  (scroll-bar-mode -1)

Modeline

Diminish

Adds support for :diminish in use-package declarations, which hides a mode from the modeline.

(use-package diminish)
Column Number

Show line and column numbers in the modeline.

(setq line-number-mode t)
(setq column-number-mode t)

Line Numbers

Use the default emacs relative line numbers, but switch to absolute lines when in insert mode.

  (use-package nlinum-relative
    :config
    (nlinum-relative-setup-evil)
    :hook (prog-mode . nlinum-relative-mode))

Show Matching Parens

Shows matching parenthesis

(require 'paren)
(setq show-paren-delay 0)
(show-paren-mode)

Scrolling

Scroll smooth-ish-ly instead of jarring jumps.

  (use-package smooth-scroll
    :config
    (smooth-scroll-mode t))

Dashboard

Show a cool custom dashboard buffer on startup.

  (use-package dashboard
    :diminish page-break-lines-mode
    :config
    (dashboard-setup-startup-hook)
    (setq initial-buffer-choice (lambda () (get-buffer "*dashboard*")))

    :custom
    (dashboard-startup-banner 'logo)
    (dashboard-banner-logo-title
     (format "Welcome to Electronic Macs. Ready in %.2f seconds with %d GCs."
             (float-time (time-subtract after-init-time before-init-time))
             gcs-done))
    (dashboard-items
     '((recents . 5)
       (agenda)
       (bookmarks . 5)
       (registers . 5))))

Themes

pywal

Fancy dynamic color scheme generation from desktop wallpapers. Requires additional setup on the machine itself.

  (defvar jf-theme-pywal-path "~/.cache/wal/colors.el" "Path to the colorscheme generated by pywal.")

  (defun jf-theme-pywal ()
    (load-file jf-theme-pywal-path))

  (when (eq 'jf-theme 'jf-theme-pywal)
    (require 'filenotify)
    (file-notify-add-watch jf-theme-pywal-path '(change) #'jf-theme-pywal))

spacemacs

This theme is pretty fancy and has lots of supported modes.

  (unless (package-installed-p 'spacemacs-theme)
    (package-install 'spacemacs-theme))

  (defun jf-theme-spacemacs ()
    (load-theme 'spacemacs-dark))

Transparency

Sets the window's transparency, to better admire choice wallpapers. The first number in the alpha section applies when the window is active, the second when it's inactive.

(set-frame-parameter (selected-frame) 'alpha 85)
(add-to-list 'default-frame-alist '(alpha . 85))

Helpers

  (defvar jf-theme #'jf-theme-pywal "Theme function to call.")

  (defun jf-apply-theme ()
    "Apply the current theme as set by jf-theme."
    (funcall jf-theme))

  (jf-apply-theme)

Organization

Capture Templates

All capture templates, from tasks to bookmarks.

Refile Targets

Goodize the refiling targets to allow refiling to arbitrary subtrees.

  (defun jf-org-capture-refile ()
    (interactive)
    (setq-local org-refile-targets '((nil :maxlevel . 5)))
    (setq-local org-refile-use-outline-path t)
    (org-refile))

Tasks

  (setq jf-org-capture-task-templates
        '(("t" "Todo")
          ("tg" "General" entry
           (file+headline "notes.org" "Todo")
           "** TODO %^{todo}\nNotes: %?\n")
          ("tt" "General (Date)" entry
           (file+olp+datetree "notes.org")
           "*** TODO %^{todo}\nDue: %^t\nNotes: %?\n")
          ("tT" "General (Date+Time)" entry
           (file+olp+datetree "notes.org")
           "*** TODO %^{todo}\nDue: %^T\nNotes: %?\n")
          ("ts" "School (Date)" entry
           (file+olp+datetree "notes.org")
           "*** TODO %^{todo}\nDue: %^t\nClass: %^{class}\nNotes: %?\n")
          ("tS" "School (Date+Time)" entry
           (file+olp+datetree "notes.org")
           "*** TODO %^{todo}\nDue: %^T\nClass: %^{class}\nNotes: %?\n")))

Bookmarks

  (setq jf-org-capture-bookmark-templates
        '(("b" "Bookmark" entry
           (file+headline "links.org" "Unsorted Links")
           "** [[%^{link}][%^{name}]]\nCreated: %U\nAbout: %^{description}%?\n")))

Personal

  (setq jf-org-capture-personal-templates
        '(("j" "Journal")
          ("jj" "Journal Entry" entry
           (file+olp+datetree "journal.org")
           "**** Today's Events\n%?")
          ("jt" "Thoughts" entry
           (file+headline "notes.org" "Thoughts")
           "** %^{summary}\n%U\n%?")
          ("jd" "Dream Journal Entry" entry
           (file+olp+datetree "dreams.org")
           "**** Dream\n%?")))

Protocol

  (setq jf-org-capture-protocol-templates
        '(("w" "Website" entry
           (file+headline "sites.org" "Unsorted Sites")
           "** [[%:link][%:description%?]]\nCreated: %U\nAbout: %^{description}%?\n%:initial")))

All

Tie it all together.

  (setq jf-org-capture-templates
        (append
         jf-org-capture-task-templates
         jf-org-capture-personal-templates
         jf-org-capture-bookmark-templates
         jf-org-capture-protocol-templates))

Structure Templates

Defines expansions with < followed by a string in org-mode.

Source Blocks

  (setq jf-org-source-structure-templates
        '(("el" "#+BEGIN_SRC emacs-lisp\n?\n#+END_SRC")))

All

Tie it all together.

(setq jf-org-structure-templates
    (append
        jf-org-source-structure-templates))

Org-mode

Keep org-mode up to date straight from the cow's utters. If the manual is not on your computer, it's here.

  (use-package org
    :pin org
    :mode ("\\.org\\'" . org-mode)
    :hook ((org-mode . org-indent-mode)
           (org-capture-mode . evil-insert-state))

    :general
    (jf-major-def
     :keymaps 'org-mode-map
     "e" 'org-export-dispatch
     "a" 'org-attach)
    (jf-org-def
     "a" 'org-agenda
     "c" 'org-capture
     "l" 'org-store-link
     "b" 'org-switchb
     "r" 'jf-org-capture-refile)
    :custom
    (org-directory "~/Documents/org")
    (org-agenda-files '("~/Documents/org/"))
    (org-default-notes-file "notes.org")
    (org-agenda-include-diary t)
    (org-src-window-setup 'current-window "Edit source code in the current window")
    (org-src-fontify-natively t "Highlight syntax in source blocks")
    (org-latex-to-pdf-process '("latexmk -f pdf %f") "Use pdflatex for export")
    (org-capture-templates jf-org-capture-templates)
    (org-structure-template-alist (append org-structure-template-alist jf-org-structure-templates)))

Pretty org-mode bullets

Make bullets look choice

  (use-package org-bullets
    :hook (org-mode . org-bullets-mode))

Communication

Web

Tools

Fuzzy Matching

Most facilities are provided by Ivy and friends, which build on existing emacs commands.

Smex

While the actual smex command is not in use, counsel-M-x will use it for sorting by usage.

(use-package smex)

Ivy

  (use-package ivy
    :init
    (defun jf-kill-current-buffer ()
      (interactive)
      (kill-buffer (current-buffer)))
    (defun jf-kill-all-buffers ()
      (interactive)
      (seq-do 'kill-buffer (buffer-list)))

    :general
    (jf-buffers-def
      "b" 'ivy-switch-buffer
      "v" 'ivy-push-view
      "V" 'ivy-pop-view
      "c" 'jf-kill-current-buffer
      "C" 'jf-kill-all-buffers)

    :custom
    (ivy-use-virtual-buffers t)
    (ivy-count-format "%d/%d"))

Counsel

A collection of ivy enhanced versions of common Emacs commands.

  (use-package counsel
    :general
    ("M-x" 'counsel-M-x)
    (jf-leader-def
      :states 'normal
      "x" 'counsel-M-x)
    (jf-files-def
      "f" 'counsel-find-file)
    (jf-help-def
      "a" 'counsel-apropos
      "f" 'counsel-describe-function
      "k" 'counsel-descbinds
      "l" 'counsel-find-library
      "s" 'counsel-info-lookup-symbol
      "u" 'counsel-unicode-char
      "v" 'counsel-describe-variable))

Swiper

An ivy-ified replacement for isearch.

  (use-package swiper
    :after evil
    :general
    (:keymaps 'override
      :states 'normal
      "/" 'swiper
      "n" 'evil-search-previous
      "N" 'evil-search-next))

Neotree

A cool toggleable directory structure sidebar. It needs icon fonts, installed with M-x all-the-icons-install-fonts.

  (use-package all-the-icons)
  (use-package neotree
    :after all-the-icons
    :general
    (jf-apps-def
      "t" 'neotree-toggle)
    :custom
    (neo-theme (if (display-graphic-p) 'icons 'arrow)))

Ranger

Brings the glory of Ranger to Emacs.

  (use-package ranger
    :commands (ranger deer))

Sunshine

Allows retrieving OpenWeatherMap forecasts in the minibuffer.

  (use-package sunshine
    :commands sunshine-forecast
    :general
    (jf-apps-def
     "w" #'sunshine-forecast)
    :custom
    (sunshine-location "Piscataway, US")
    (sunshine-units 'metric)
    (sunshine-appid "7caf100277f14845e7f354c6590a09cb")
    (sunshine-show-icons t))

Programming

Formatting

Indentation

Set some sane defaults

(setq jf-tab-width 4)
(setq-default python-indent-offset jf-tab-width)
(setq-default evil-shift-width jf-tab-width)
(setq-default c-basic-offset jf-tab-width)
; Disable annoying electric indent of previous lines
(setq-default electric-indent-inhibit t)
; Eat the whole tab when I press backspace
(setq backward-delete-char-untabify-method 'hungry)

Define some useful helper functions

  (defun jf-indent-tabs (width)
    (interactive "nTab width: ")
    (setq tab-width width)
    (local-set-key (kbd "TAB") 'tab-to-tab-stop)
    (setq indent-tabs-mode t))

  (defun jf-indent-spaces (num)
    (interactive "nNumber of spaces: ")
    (setq tab-width num)
    (setq indent-tabs-mode nil))

  ;; Default to 4 spaces
  (add-hook 'prog-mode-hook #'jf-indent-4-spaces)

  ;; Define functions for every level of indent that might need hooking
  (cl-macrolet
      ((jf-define-indent-funs (widths)
         `(progn
            ,@(mapcan
               (lambda (num)
                 `((defun ,(intern (concat "jf-indent-" (number-to-string num) "-spaces")) ()
                     (jf-indent-spaces ,num))
                   (defun ,(intern (concat "jf-indent-tabs-" (number-to-string num))) ()
                     (jf-indent-tabs ,num))))
               widths))))
    (jf-define-indent-funs (2 4 8)))

  ;; TODO: Replace with dedicated whitespace config
  (setq whitespace-style '(face tabs tab-mark trailing))
  (custom-set-faces
     '(whitespace-tab ((t (:foreground "#636363")))))

  ;; Make tabs visible
  (setq whitespace-display-mappings
     '((tab-mark 9 [124 9] [92 9])))

  (add-hook 'prog-mode-hook #'whitespace-mode)

Parentheses

Smartparens

Smartparens handles parens for languages that aren't lispy.

  (use-package smartparens
    :diminish
    :commands smartparens-mode
    :config
    (require 'smartparens-config))
ParEdit

And ParEdit handles the rest.

  (use-package paredit
    :diminish
    :commands enable-paredit-mode)
Evil-Cleverparens

Evil-Cleverparens adds additional features to Evil all about working with sexps, including keeping parens balanced when using commands like dd.

  (use-package evil-cleverparens
    :diminish
    :commands evil-cleverparens-mode)
Activation

Pick a suitable parenthesis editing mode for the current major mode when entering any prog-mode derivative.

  (defun jf-paren-mode ()
    (if (member major-mode '(emacs-lisp-mode
                             lisp-mode
                             lisp-interaction-mode
                             scheme-mode))
        (enable-paredit-mode)
      (smartparens-mode)))

  (add-hook 'prog-mode-hook #'jf-paren-mode)

Whitespace

ws-butler

Unobtrusively cleans up whitespace before EOLs as you edit, stopping the noisy commits generated from blanket trimming entire files.

  (use-package ws-butler
    :hook (prog-mode . ws-butler-mode))

pretty-mode

pretty-mode redisplays parts of the Emacs buffer as pretty symbols.

  (use-package pretty-mode
    :hook (prog-mode . pretty-mode)
    :config
    (pretty-deactivate-groups '(:arithmetic
                                :sub-and-superscripts))
    (pretty-activate-groups '(:equality
                              :ordering
                              :ordering-double
                              :ordering-triple
                              :arrows
                              :arrows-twoheaded
                              :punctuation
                              :logic
                              :sets)))

Prettify-Symbols-Mode

Allows custom unicode replacement of symbols. Fill in the gaps where pretty-mode left off.

Python
  (defun jf-prettify-python ()
    (dolist (pair '(;; Syntax
           ("in" .       #x2208)
           ("not in" .   #x2209)
           ("return" .   #x27fc)
           ("yield" .    #x27fb)
           ("for" .      #x2200)
           ;; Base Types
           ("int" .      #x2124)
           ("float" .    #x211d)
           ("str" .      #x1d54a)
           ("True" .     #x1d54b)
           ("False" .    #x1d53d)))
      (push pair prettify-symbols-alist)))

  (add-hook 'python-mode-hook #'prettify-symbols-mode)
  (add-hook 'python-mode-hook #'jf-prettify-python)

Checkers

Flycheck

Flycheck highlights syntax errors in a few languages.

  (use-package flycheck
    :hook (prog-mode . flycheck-mode))

Column 80 Highlight

Add a hotkey for highlighting column 80 and activate it in prog-mode

  (use-package fill-column-indicator
    :init
    (setq fci-rule-use-dashes t)
    (setq fci-rule-column 80)
    :general
    (jf-major-def
      :keymaps 'prog-mode-map
      "8" 'fci-mode))

Completion

Company

Company auto-completes stuff in the buffer, and company-quickhelp shows documentation popups when idling on a completion candidate.

  (use-package company
    :hook (prog-mode . company-mode)
    :general
    (:keymaps 'company-active-map
              "C-SPC" 'company-abort)

    :custom
    (company-maximum-prefix-length 2)
    (company-idle-delay 0.2 "Decrease idle delay"))

  (use-package company-quickhelp
    :after company
    :hook (company-mode . company-quickhelp-mode))

Snippets

Yasnippet adds support for custom snippets

  (use-package yasnippet
    :hook (prog-mode . yas-minor-mode)
    :custom
    (yas-snippet-dirs
     '("~/.emacs.d/snippets"
       "~/.emacs.d/elpa/yasnippet-snippets-0.6/snippets")))

Debugging

Realgud

Realgud is a modular frontend for many debuggers, right in Emacs.

  (use-package realgud
    :commands
    (realgud:gdb
     realgud:lldb
     realgud:node-inspect
     realgud:pdb
     realgud:trepan3k))

RMSbolt

RMSbolt Shows disassembly in a buffer next to code, highlighting relevant regions.

  (use-package rmsbolt
    :commands rmsbolt-mode)

Git

Magit

It's magic git! Keybinds here

  (use-package magit
    :general
    (jf-git-def
      "b" 'magit-blame-addition
      "B" 'magit-blame-reverse
      "s" 'magit-status))

It's evil magic git!

(use-package evil-magit
  :after (evil magit))

Forge

Magic GitHub facilities for git forges such as GitHub and GitLab!

  (use-package forge
    :after magit)

Smeargle

Highlights regions in files by last update time. Older regions are more whitey and newer regions are more blacky.

  (use-package smeargle
    :general
    (jf-git-def
      "H t" 'smeargle
      "H h" 'smeargle-commits
      "H c" 'smeargle-clear))

Projects

Projectile provides project-level features like make shortcuts and file switching

  (use-package projectile
    :defer t
    :preface
    (defvar jf-projects-path "~/Documents/dev")

    :general
    (jf-leader-def
     "p" '(:keymap projectile-command-map))

    :config
    (projectile-mode 1)
    ;; Discover projects in jf-projects-path
    (let ((subdirs (directory-files jf-projects-path t)))
      (dolist (dir subdirs)
        (unless (member (file-name-nondirectory dir) '(".." "."))
          (when (file-directory-p dir)
            (let ((default-directory dir)
                  (projectile-cached-project-root dir))
              (when (projectile-project-p)
                (projectile-add-known-project (projectile-project-root))))))))

    :custom
    (projectile-completion-system 'ivy)
    (projectile-project-search-path (list jf-projects-path)))

Languages

Fish

Mode for editing of scripts for the fish shell.

  (use-package fish-mode
    :mode "\\.fish\\'")

Markdown

Mode for editing markdown.

  (use-package markdown-mode
    :mode "\\.md\\'")

Python

Jedi for autocompletion sources in python-mode.

  (use-package company-jedi
    :company python-mode)

Javascript

js2-mode improves the default js mode.

  (use-package js2-mode
    :mode "\\.js\\'"
    :interpreter "node")

Web

Web-mode should give everything you need for a web-dev major mode. Company integration is done with company-web.

  (use-package web-mode
    :mode ("\\.html\\'"
           "\\.php\\'"
           "\\.blade\\.")
    :custom
    (web-mode-code-indent-offset 4)
    (web-mode-indent-style 4))

  (use-package company-web
    :company web-mode)

JSON

Mode for editing JSON files.

  (use-package json-mode
    :mode "\\.json\\'")

YAML

Mode for editing YAML files.

  (use-package yaml-mode
    :mode "\\.yaml\\'")

Arch PKGBUILD

Mode for editing PKGBUILD files.

  (use-package pkgbuild-mode
    :mode ".*PKGBUILD\\'")

LaTeX

AUCTeX

AUCTeX is a major mode for editing TeX. Company completions are handled by company-auctex and company-math.

  (use-package tex
    :defer t
    :ensure auctex
    :general
    (jf-major-def
     :keymaps 'TeX-mode-map
     "e" 'TeX-command-run-all)

    :custom
    (TeX-auto-save t))

  (use-package company-auctex
    :company LaTeX-mode)

  (use-package company-math
    :company ((TeX-mode . company-math-symbols-latex)
              (TeX-mode . company-math-symbols-unicode)
              (TeX-mode . company-latex-commands)))
Cdlatex

cdlatex adds better TeX-specific template expansions and other niceties.

Environment
  (setq jf-cdlatex-envs nil)
Commands
  (setq jf-cdlatex-commands nil)
Math Symbols
  (setq jf-cdlatex-symbols
        '((?I ("\\infty"))))
Setup
  (use-package cdlatex
    :hook (LaTeX-mode . cdlatex-mode)
    :custom
    (cdlatex-env-alist jf-cdlatex-envs)
    (cdlatex-command-alist jf-cdlatex-commands)
    (cdlatex-math-symbol-alist jf-cdlatex-symbols))

Rust

  (use-package rust-mode
    :mode "\\.rs\\'"
    :general)

  (use-package flycheck-rust
    :after flycheck
    :hook (rust-mode . flycheck-rust-setup))

  (use-package racer
    :hook ((rust-mode . racer-mode)
           (rust-mode . eldoc-mode))
    :custom
    (racer-cmd "~/.cargo/bin/racer")
    (racer-rust-src-path "~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src"))

  (use-package cargo
    :hook (rust-mode . cargo-minor-mode)
    :general
    (jf-major-def
     :keymaps 'rust-mode-map
     "b" #'cargo-process-build
     "r" #'cargo-process-run
     "t" #'cargo-process-test))

C/C++

Irony

Irony handles enhanced C/C++ operations powered by clang company-irony for company integration

  (use-package irony
    :hook ((c-mode c++-mode) . irony-mode)
           (irony-mode . irony-cdb-autosetup-compile-options))

  (use-package flycheck-irony
    :after flycheck
    :hook (irony-mode . flycheck-irony-setup))

  (use-package company-irony
    :company irony-mode)

  (use-package company-irony-c-headers
    :company irony-mode)

Lua

  (use-package lua-mode
    :mode "\\.lua\\'")

  (use-package company-lua
    :company lua-mode)